Oddly Fast Weight Gain, Normal?

Hey everyone I’m a novice powerlifter (5 years under my belt) and I had a serious shoulder injury off for almost a year. Anyway I lost a lot of muscle and strength and started to cycle because of that reason. Anyway I have gained 6 ( fluxuating to from 6-9. pounds already I’m not even a week into my cycle I’m using it for recomp as well so the weight gain doesn’t make sense to me…could someone maybe make sense of this?here are my pre injury stats post Injury cycle and nutritional stats:

Pre Injury-
Height 5’9
Weight -265
Bf- fluxed between 16-20
Post injury
weight 215
Bf 22

Cycle-
Week 1-4 100mg anavar 2cc t-400
4-12 2cc t-400

Diet
Intermittent fasting
Morning - 10 g BCAA
Lunch /post workout 10g bccas
Dinner 2500/2000 cals (training/rest)
300 gram protien 160 grams fat 40 gram fibre
200 gram protien 160 grams fat 40 gram fibre

I’m hoping the weight gain is due to the short esters…but still should take 1-2 weeks to kick in .all info will be greatly appreciated

Water weight

AI?