Don't u think it's pretty weird that my mom insists on being friends with my x bestfriends on facebook ?

I haven't been friends with them in a year! She tells me and then I obv get mad she says I'll delete them and talks **** about them. Well today she wanted my camera to put pics of our trip on her fb! I said k but are brittany and Jess still on ur fb? She's like yah I can have who I want ur always starting ****... But it's because they have me blocked and I don't want them seeing pics of me on our trip! I told her that too and she just lied and said she didn't even delete them before blah blah when I know she did bcuz she showed me? Like I don't c how I'm in the wrong? I took my camera nd am not letting her put them up bcuz she lied...I'm 21 nd my 2 x bestfriends r as well and now they're bestfriends and I don't c y my mom needs to be in contact with them ? It's not like they ere suuuuuuper close!