I don't think this is weird at all. Sad, but not weird.
I also do not allow my mom to babysit my 19 month old son unless it is an absolute emergency and totally unavoidable. Thus, it happens next to NEVER. Why? Well... not only was she an awful parent to me, she's still a very selfish person. She literally refuses to see anything from a child's point of view. And her parenting style differs GREATLY from mine. I do not believe in cry-it-out - in fact, at 19 months, we still co-sleep and breastfeed. I will drop everything to give him my undivided attention and go to any length to let him know he's important to me. She's the complete opposite. And he has been hurt in her care twice because of her cold method of "child care". Once, he fell out of my bed - um, yeah, I "co" sleep in my bed; thus, he does not go down for a nap in my bed and get left alone to cry it out until he passes out from exhaustion! But, that's what she did... and he fell out of my bed b/c she'd gone downstairs to read a book while he bawled and scooched himself right out onto the hardwood floors 36 inches away. She even blamed ME for it because there were books in his crib (we don't use it, so there was no hurry to get the books out) - as if she was incapable of moving the books if she intended to leave him, right? She never even apologized. He was 8 months old when that happened. A few months later, she was watching him overnight b/c one of my other sons was in the hospital. Apparently he was again crying it out (this breaks my heart to no end to know he's been through this) in his pack n play while she was downstairs watching TV or whatever. She heard a loud thud and figured he'd fallen onto his bottom in the pack and play. A few minutes later, she went to take some towels to the upstairs linen closet and lo & behold, there was my son at the doorway of the guest bedroom - he'd climbed to the top of the P&P and FALLEN OUT. Thank GOD she had a gate in the bedroom (to keep her dogs out) because only 3 feet away from that doorway is the very steep staircase!!! She wasn't even going to check on him when she heard the thud. Nor was she going to comfort him despite crying for God only knows how long. And, again, no apology. Just an attitude like, "Not my fault."
So, no, I don't think you're weird AT ALL!!