It's working as intended. In beta with fishing leves you used to get like 300xp for each non leve fish on the fish spot quests even if you fished it out and kept fishing before going to the next spot, in live this is no longer so. I'm sure it's the same with combat classes. I got conjurer to 4 last night and I didn't notice killing a star marmot with the favor active giving me more xp then killing it without before I got even to my leve camp.
At lower levels xp just comes faster then it seems to come to a almost complete stop or you get like 20xp, which is a sign that you need to target higher mobs. The same with fishing, kinda, you gotta keep moving as you rank up.
FFXIV: Dennis Galen - FSH 50 | CRP 38 | LEA 27 | WEA 25 | CON 9 - Selbina server
FFXIV: Dennis Ramuh - CON 7 | ALC 7 - Selbina server
FFXI: Dennis - Hume Rank 10 Bastok - Ramuh server - LS: PandemoniumKnights 60 Summoner 75 Black Mage
| 75 White Mage 75 Red Mage
Alchemy 93,1 +2 | Fish 100 | Gold 32
Wood 22 | Cooking 15 | Smith 14 | Leather 9