gist DatumGetPointer returns pointer to corrupted data

I index these structures in gist:

typedef struct {
> uint8 type_flag;
> float8 xi;
> float8 yi;
> Timestamp ti;
> float8 xe;
> float8 ye;
> Timestamp te;
> int32 id;
> } typ_s_flagged;
>
> typedef struct {
> uint8 type_flag;
> float8 xl;
> float8 yl;
> Timestamp tl;
> float8 xh;
> float8 yh;
> Timestamp th;
> } typ_b_flagged;
>

typ_s_flagged is the type of leaf entries and typ_b_flagged is for non-leaf
entries.
This is how I determine which type it is in functions union, picksplit,
penalty etc (I tried to use GIST_LEAF but it produced errors in execution
time!, anyway I know this might not be a best practice but it is not wrong).

GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); //in penalty,
> consistent
>
//or GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
> entry = &entryvec->vector[i]; in union and picksplit
> uint8 *type_flag = (uint8 *) DatumGetPointer(entry->key);
> if (*type_flag == 0) {
> typ_s_flagged *p1 = (typ_s_flagged *) DatumGetPointer(entry->key);
> } else if(*type_flag == 1){
> typ_b_flagged *p2 = (typ_b_flagged *) DatumGetPointer(entry->key);
> }
>

The problem is that when I access *p1->te* or *p1->id* or *p2->th* the value
I get is zeros, for both. But I get correct values for variables before *
p1->te*.
I checked my code multiple times and I didn't found a mistake like bad size
in palloc or wrong variable assignment.
I checked compress function and it seems to accept and return correct
values.
*Does anyone have any idea on how to solve this? Or why it happens?
*