This is going to be looonnngggg....

I have a few questions about the slipperyness of the bottom of my pool. I tried to rename this thread but couldn't do it.
The SLAM worked and my pool has been crystal clear since. My problem is the slippery bottom. I have read a million times on here that slippery means algae...but my numbers are all great. I also read that perhaps the water isn't circulating enough over the bottom of the pool and a fine layer is forming there. I scrub at least every two days and have an automated pool cleaner that also "scrubs" the sides and bottom.
The interesting thing is this,
Once the pool was slammed and the water was clear (6/19) with no chlorine loss overnight I used bleach to keep the chlorine levels up until we got our new SWG cell on 6/20. We installed it that day and set it to 60%. My numbers that day were
FC 7 CC .5 and they were the same that night.
6/21 early am FC was 7.5 and that night 7. On Sunday 6/22 my numbers were
FC 8
CC 0
PH 7.8
TA 75-80
CYA 60
CH 120
Salt 3300. The bottom was "squeeky clean" for the first time in years. There was no slime or residue! Monday eve the FC was 7.5 and PH was 7.8. Still great with no slime. I was still making sure the SWG was set at the correct output and seemed to be holding.
Tuesday 6/24 we went on vacation for a week. We had someone vacuum the pool and they used it while we were gone with kids etc. We also has a huge rainstorm that week and a few inches were added to the pool.
When I returned 6/29 the numbers were FC 6, PH 7.6, CYA 60, TA 60, I added bleach and a littlewashing soda because the pool seemed to be doing so well with the higher PH. The bottom was super slippery.
Monday 6/30 the PH was 8.2 and FC was 8. the bottom was dangerously slippery. I added a little acid and yesterday (after a day in the sun) my numbers were FC 7.CC .5...PH 7.8...CYA 60..TA 80...CH 110. The pool bottom felt a lot better. Not like it did a week ago when it was perfect but better. I had the pool store test for metals and phosphates.
Their numbers were FC 5.63...CC .14...PH 8.3...CH 64...TA 75...CYA 82...Copper .1..Iron .2...Borate 5ppm. I changed the output of the SWG to 70% to keep from losing during the day.
This am my numbers are PH 7.8..FC 7. So no overnight loss and the bottom is the same as yesterday.
I am wondering first...why are their numbers so different than mine? Second..can the PH and FC affect the slipperyness? Could it be that my pool needs a high PH and high FC to keep the bottom from being slippery? I also noticed my TA was higher when the bottom was clean...can a higher TA help with slippery conditions? It was higher after the washing soda when I raised the PH.
Should I rause the PH to 8 and FC to 9 ?
They said the phosphates were between 200 and 400. I don't know what that means..btw..the girl really didn't seem to have a clue.
I just don't think it is algae since I had some success with the bottom before I left.
Thanks for your time.