I have a wall shelf that I'd like to mount into a concrete wall. Unfortunately, due to a mistake I ended up with two different anchors (not sure what the term is - I think it's anchor, bracket, or chevron) - see picture below.
The shelf is going to only hold light items (less than 2kg load), and will not be easily seen. Slightly-unsightly-aspect aside, is this likely to be a (structural) problem? Should I get two identical anchors/brackets/chevrons, or is it OK to proceed with these two different ones?