I think this is normal, like if there was a new hookup or I knew someones got different weed, I would purchase the different shit to try it, even if I knew I could reliably get good weed elsewhere. You want to switch up the type of weed you are smoking anyway, if you just finished smoking your way through a half bag or bag of some really good weed, and can go get this slightly better weed again or some slightly shitter weed thats different, I find the different weed gets you higher anyway.
I used to ALWAYS pick up before I ran out and commence smoking the new shit and save the old shit. Usually I would have atleast a couple grams of a few different types of weed going and on different days I would be like hmmm, I feel like this bud today.
Obviously until I was getting near the end the weed I picked up most recently I would have the most of so smoke that the most, but still switch it up a bit you know. I would start trying to score again when I got down to my last 6 or 7 grams, often by the time I got on it was more like 2-4. Say I had 10 grams left I would usually have lke 2 grams one kind, 3 grams another and 5 grams of yet another. I would often save the very last gram of types of weed to the point I had like 5 or 6 different kinds I could smoke if I wanted lol. I really was a freak.
In my whole time smoking daily the lowest I got was like 1-1.5 grams and I was practically in tears thinking I wouldn't get on.
I would always remember who I got each type off and when, quality, taste, level of dryness like every detail of each type of weed lol.
When me and mates met up for a smoke we would all have different kinds and always discuss where we got it from and how much for, compare quality and shit lol.
So I used to be in the same boat as you to the extreme, pretty funny now, I didn't even realize how sad/dependant on weed I really was at the time.