I asked around about that before and there are really some drivers/owners who think that they cannot remove the old stickers as "Baka bawal". If you're lazy to remove the old plate sticko, you can always stick on top of the old one.
What's crazy was i once rode the 1993 XL Corolla of my friend and she never removed any of her old windshield stickers
i have a feeling sinasadya nila yan so that natatakpan yung ibang numbers/letters. yung E nagiging F, yung 8 nagiging 6, etc.
sa case ko, i only have last year's and this year's sticker on the lower left and lower right. pag may new sticker, tanggalin yung mas luma so that palaging 2 lang ang sticker ko.
hehehe im somewhat guilty from this. but its the the other way around. last sticker in my plate number is 2007 pa. ang tamad ko kasi, bihira na kasi ko makaluwas ng manila kay siguro na kakalimutan ko idikit... lagi ko pa rin naman dala stickers ng '08 and '09 sa kotse kasama ng copy ng OR / CR sa glove compartment.
Sayang hindi ko inabutan yung isag car sa may ortigas ave. naka Jdm na plate number sa likod, mas matindi yun. pwede ba yung ganun? sa tingin ko kasi kung yung madaming stickers nga halos di na makita plate number yung pang iba nakalagay sa likod.
ang dami ko din nakikita na ganyan. hahaha. ewan kung bakit. meron hindi mo na maintindihan ung mga letters and numbers. siguro un na rin ang reason, para iwas matandaan ung plate. tsk tsk
OT: meron pati ung registration sticker sa windshield sobrang dami din.